This is just too awesome and funny at the same time!
I've got a buddy in the MCPD and he told me this guy's story is
actually pretty cool – he's crazy wealthy (off what I don't know), but
he apparently goes to hospitals and meets up with sick kids as Batman to
brighten their day. The tags were in his backseat because he couldn't
get the poor people screws to work on his $800k car. As to why he was
still in costume when he got pulled over, the latex suit is apparently
not so easy to get in/out of, so he has to do it at home. Unfortunately
he did not talk like Christian Bale or reference Commissioner Gordon and
the bat signal at any time during the stop."
Read the full story at Jalopnik